Study Physics Ch. 15 and part of 16 Flash Cards

 
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Physics Ch. 15 and part of 16

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units of potential difference are _____.
Volt or J/C
the electric potential of a point of charge is defined as _______.
(k x q)/r
the electric field is defined as __________ divided by ________.
force ; charge F/Qo
If charges have the same sign PE is ________. If charges have opposite signs PE is ________.
positive; negative
The total electric potential at some point P due to several point charges is the ______ of the electric potentials due to the individual charges.
algebraic sum
A negative charge ____ electrical potential energy when it moves in the direction opposite of the electric field.
loses
A positive charge _____ electrical potential energy when it is moved in a direction opposite the electric field.
gains
potential difference and potential energy are _______ quantities.
scalar
potential difference or delta V = _______ divided by ________.
delta PE / q
________ is defined as the change in the potential energy of a charge moved from point A to B divided by the size of the charge.
potential difference
Work done by a conservative force is equal to the __ of the change in potential energy.
negative
The electrostatic force is a _________ force.
conservative force
_________ states that the electric flux through any closed surface is equal to the net charge Q inside the surface divided by the permittivity of free space.
Gauss' Law
Electric flux is represented by _____.
O with I vertically placed in it
The electric field just outside a charged conductor is ______ to the conductor's surface.
perpendicular
Any excess charge on an isolated conductor resides entirely on its _____.
surface
The electric field is ___ everywhere inside the conducting material.
zero
When no net motion of charge occurs within a conductor, the conductor is said to be in _______.
electrostatic equilibrium
An electric _______ consists of two equal and opposite charges.
dipole
A convenient aid for visualizing electric field patterns is to draw lines pointing in the direction of the field vector at any point.
electric field lines
The electric field produced by a positive charge is directed _________ from the charge.
away
The electric field produced by a negative charge is directed _____ the charge.
toward
Electric field's SI units are ________. It is a _______ quantity.
N/C ; vector
An _________ is said to exist in the region of space around a charged object.
electric field
The resultant force on any one charge equals the vector sum of the forces exerted by the other individual charges that are present.
the superposition principle
_________ force is strong than the _________ force.
electrostatic; gravitational
__________ are always attractive.
gravitational forces
Electrical forces can either be ________ or _________.
attractive; repulsive
With a _________, the force is exerted by one object on another object even though they are not in contact with each other.
field force
Coulomb's constant is symbolized by _______.
k e = 8.9 x10^9 N m^2/C^2
The realignment of charge on the surface of an insulator is known as ________.
polarization
The characteristics of _______ are between those of insulators and conductors.
semiconductors
_______ are materials in which electric charges do not move freely.
insulators
_____ are materials in which the electric charges move freely in response to an electric force.
conductors
The SI unit of charge is the ____.
Coulomb
All charge is a multiple of a fundamental unit of charge, symbolized by ___.
e
Charge is _________.
quantized
Electric charge is always _____.
conserved
Nature's basic carrier of positive charge is the _______ and nature's basic carrier of negative charge is the _______.
proton; electron
Like charges ________ and unlike charges ________ one another.
repel; attract
Two types of electric charges are ____.
positive and negative

**named by Benjamin Franklin
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